Buoyancy aid



FIG. 1 is a perspective view of a buoyancy aid, showing my new design;

FIG. 2 is a front elevational view of a buoyancy aid;

FIG. 3 is a back elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines on the buoyancy aid represent stitching and form part of the claimed design. 

CLAIM The ornamental design for a buoyancy aid, as shown and described. 